Change-over for sound picture apparatus



Feb. 1, 1938. J. F.l NIELSEN CHANGE-OVER FOR SOUND PICTURE APPARATUS 2 Sheets-Sheet l Filed Jan 27' 1934 PIE-1:3

INVENTQQ JOHN E' NELSEN BY .l

AT1-ORNE* Feb. l, 1938.

J. F. NIELSEN 2,106,957

CHANGE-OVER FOR SOUND PICTURE APPARATUS Filed Jan. 27, 1934 2 sheets-sheet 2 Q x IO 1 /9 l 97, .92 ln. .1 @mL-555.@ l(

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l INVENTOR as JOHN T/V/ELSEN @WW ATTORNEY Patenten Feb. 1, 1938 i STATES weest CHANGE-ovm Fon so Heee srmnsens John i?. Nielsen, Gerona, Elon@ Hsiena, N., Yo,

signor to United figiictttion Jammer? 27 left/2419 No.,

mms

Et ,tem ponnlery Jn es e, intiem to notentitI ci reoroeneticn rioni one sound liess nth e separate tiet/"ice om one nrcieetor ci' tine present invention to of o. eotentionieter or fader in tine ts enti to eutonietceily eeet the feovei simultaneously with the picture in e, simple efeetive manner, witntce changeover to tine eudienee.

ere accomplished in e simple D etivantege ci the .feet "i oiiengeever is mede et the proper insistant, eiieience cannet eieteet the cheeseover even onen it is mede instsntaneontsiy in@ steed oi gradually., es heretoi'ore gcioposeeiH The invention movidas. switching; ineens mor/:siete 'to eiternete eeitions for eieetine' the sonnet enti piet@ chengeover from eeen of two sonne `iniettare n ines to time @teem A n .is illustrated in eonneetien with sever now eveiieisie on the merken i other type o enengeover may ne e emngeover embodied in this mwen.:3 ses e soienoidwonereted shutter for e projecto?, the shutter being @eersten o eef/fer tire pistone enerture of the projector wi being operated Toy another een bte permit tf ejected beam of iight to resten the eoeen ecienoieis for two machines ese simulates @sin operated in opposite senses to fro one pieture projeetor to another., order te eneet e changeover oi the sound-seem timing epgonzetus simultaneously with the nietnre changeover, the invention provides a circuit er rangement operated by the picture changeover to simultaneously effect the changeover of tine sound-renotiueing apparatusc For further details of the invention reference may be mede to the drawings wherein Fieo i is a View in elevation of one unit of a sound end piotnee changeover mechanism according to the invention.

Fig. 2 is a View of the unit of Fig. 1 ywith. th operating mechanism in its alternate position or View of e. seeonti enit ecceerene: with the e n switches i9 s'witening devise sur., E e, nsoiiiicet l soieneieimogcemted switen femm kthe enti nieuwe Eerne; i tieteii ne eretti pietme projector i e 'with se@ motion petnre To side tiieeec w. gsuiletiewn meeltienism understood in the @rejected through proj tion een te which is etteened. i tese e'iosee. strette?- i s ended e, bei?. eens iev s iev neicket is suitsoiy estened Toy such es baits to the weil of projector: L SUT-snorted fastened tneieto .eens sncn es iceits i e, soenoic L i nie stmetere eneios two noiiow Si, 32 connes e@ shown in .ae terrneeis ei ie in The .i nger eentieiiy wit.. @eid strnetnre i@ s windings end. i mises two soit i iatures M- w n ere eiteineteiy eetc on when ernment is u.iiee to ternnnes it to the "ernste ne whese the' eo: by corres@eneiin` gizee, the plunger i2 is moved to `tine position shown in Figsu i enti 3 to drop shutter 3, enti the contacts iii and, 2e of switch i5 ere cioseo. When the solenoid 9i is energized and. Q2 is deenergized, the shutter 3 is raised as shown in Figs 2 and 4, the end 2l' of plunger i2 actuating the spring clip 22 which lies in its path,

e trees` et to thereby open the circuit connected to these, contacts.

Referring to Fig. 5, two sound picture machines 23 and 23' are illustrated with a single hand or foot operated switch 25 to simultaneouslyeifect sound Vand picture changeover in one sense through the instrumentality of the apparatus shown in Figs. l. to 4, and a single hand or foot operated switch 25 to changeover in the alternate sense.

The talking motion picture machine 23 is illustrated as comprising illm supply and takeup reels 25 and 26 `for sound on lm 3|, with the light source 21, condenser lens 28, .picture gate 29, and focusing lens 30, for projecting the picture along an optical axis intercepted at times by shutter t The sound track on lm 3| is reproduced by light source 32 and light sensitive cell 33. The parts just described are also present in the mternate machine 23' which is provided with alight sensitive cell 33'. Cell 33 is provided with a source of polarizing current 35 and is coupled through transformer 38 to the line 31 which leads by way of switch 5 or I5 through amplier 38 to the loud speaker `35. Cell 33' is similarly coupled through transformer 35' to line 31.', the lines 3i and 31' being connected in series relation to the amplier 38.

Between transformer 36 and ampliiier 3B, a shunt circuit 42 across the line 31 is taken to the contacts i9 and 20, and in the position shown in Fig. 5 the line 31 is short clrcuited by these contacts i9 and 20 to prevent sound reproduction from machine 23 and to permit reproduction from machine 23 where the contacts I8' and 20' therefor are open. At this time, shutter 3 is in the position shown in Fig. 1, and shutter 3' is in the position shown in Fig. 2. The contacts i9' and 20' for machine 23 are connected in` shunt to line 31', in the same way that the same contacts for the alternate machine 23 are connected. The coils 9|, 52, also 9|', and 92' are supplied with current from battery 43 under control of the switches 25 and 25 which are preferably arranged adjacent their respective machinesand foot-operated. When the switch 25 is closed, the opening coil 9| of one machine, and the closing coil 92' of the alternate machine are' simultaneously energized to move the sound and picture changeover mechanism to positions alternate to that shown in Fig. 5, and switch 25' when closed energizing the closing coil 92 of changeover 9 and the opening coil 9| of changeover 3' simultaneously to move the changeover mechanism to the position shown in Fig. 5.

Assuming machine 23 to be idle and machine 23' to be running, when the end of the reel on machine 23 is approached, at a prearranged cue taken from the picture projected by machine 23', the machine 23 isstarted into operation. After a short interval, the switch 25 is operated to start sound and picture reproduction from machine23, so that the subsequent reel of a series may be supplied to machine 23' which is made ready to begin operation by closing switch 25' when the end of the reel for machinel 23 is reached.

Instead of employing two switching devices I5 and I5' as shown in Fig. 5, these two switches may be consolidated into a unitary switching device 44 as shown in Fig. 6. The top pair of contacts 45 are connected in circuit the same way as contacts I 9 and 20 oi' Fig. 5, and the bottomcontacts 46 are connected the same way as to raise the contact i9' away from contact 20' contacts I9 and ZB'of Fig. 5. The contacts of the switch 44 are actuated by a plunger I2' as described in connection with Fig. 5.

Referring to Fig. 7, a switching device 41, like 44 in Fig. 6, may be actuated by the plunger 48 of a solenoid 49, the plunger 8 serving merely to actuate the switch 41 instead of being employed to operate the shutter of the picture changeover. The coil 50 of solenoid 4S is connected in parallel with the opening coil 9| and with the closing coil $2 and is actuated simultaneously therewith under control of switch 25 to operate switch 41 to the position shown wherein the top pair of contacts 52 short circuit the line 31'. Similarly the coil 5| of solenoid 49 is connected in parallel with the closing coil 92 and with the opening coil 9| under control of switch 25' to be simultaneously energized thereby whereupon the plunger 48 is actuated to its alternate position to open contacts 53. Therefore, sound and picture changeover is effected in Fig. 1 by means of switching mechanism 41, 49 which is separate and distinct from, but which is actuated contemporaneously with, the picture changeovers 9 and 9'.

It will be apparent that various modifications may be made in the arrangement above described. For example, the contacts operated by plunger |2 and |2' instead of short circuiting a series arrangement of sound heads as shown in Fig. 5, can open circuit a parallel connection of the sound heads as will be obvious. Also any other picture shutter device than that shown herein may be used for the purpose of effecting the sound changeover.

I claim:

1. The combination of a. plurality of talking motion picture machines, a switch for each thereof, means under control of said switches for changing over picture reproduction from' one of said machines to another, and'means under control of said switches for changing over sound reproduction in like manner from one of said machines to another, said last mentioned means comprising a solenoid, a reciprocating plunger therefor, three aligned contacts adjacent one end of said plunger, means adapted to be engaged by said end of said plunger and adapted to be disengaged therefrom for alternately operating said contactsin pairs, and circuit connections between said pairs of contacts and the sound reproducing circuits of said machines respectively.

2. Sound and picture changeover apparatus comprising a motion picture'projector, a picture changeover therefor having a coil operated plunger, lm sound record reproducing means associated therewith comprising a light sensitive cell, an amplifier, a loud speaker connected to said amplifier, a transformer for coupling said cell to said amplifier, a second motion picture projector,

'a second picture changeover therefor having a coil operated plunger and iilm sound record reproducing means associated with said second pro- Jectorand comprising a second light sensitive cell, and a. second transformer for coupling said second cell to said amplier, a pair of contacts for each of said plungers andarranged in shunt with each of said transformers, and means for alternately energizing said coils to operate said plungers and their respective contacts to instantaneously switch sound and'picture reproduction from one oi' said sound and picture reproducing means to the other thereof.

3. Sound and picture changeover apparatus comprising a motion picture projector having a light blocking mechanism adapted to be removed anoaootf 3 sol, lllrn sound recorc'i seproducing with said projector comprising; ltve nell, an amplles, a transfomer @ell to salfl amplllletp louol conmeoteol to said ampllles, a second mo projector having a second. light om adapted to be remove@ and re-z ond film sound :recom reproduslna lated with said second "projector com-1 w L second light sensitive cell, and a second l t for coupling said second cell to said a npl'l l; electrical contacts ln shunt with each 'znlnormera means for alternately op erating said and said blocking mecham nlsm to instantaneously switch sound and picture freproduetlon rlfom. one of said sound and piotuye @producing means the otlte. thereof said means including lncependent elestrically actulat lng means for each light blocking mechanism and respective sound contacts, and means for smtuat-n lng 'both of said eleotrloal means simultaneously for simultaneously aotuating said light blocking mechanisms and contacts for each of said picture 10 projectozv'z JOHN NIELSEN. 

